SEO Work

One of the least ethical SEO techniques in my opinion is content stealing, better known as content leaching. This is where a scammer copies your site but puts his own advertisements on it.

Content stealing must be effective—too many sites do it for it to be entirely unprofitable—but the margins are very low and the risks are high. The margins are low because Google tries to put content thieves out of business and the risk is high because the thieves could always be caught and taken to court (although that rarely happens).